Shoveling and loading machine



J. C; BRACKETT.

SHOVELING AND LOADING MACHINE. APPLICATION FILED MAY15| 1917. RENEWEDJAN. 13.1921. 1,371,293.

Patented Mar. 15, 1921.

- C/IVVENTOR Afro/m5 WITNESSES. 4/7.

UNITED STATES PATENT: omce.

JOHN .c. BRAGKE'IT, or MILWAUKEE, WISCONSIN, ASSIGNOR T0 MIDDLEMISS AimIBRACKETT, or MILWAUKEE, WISCONSIN, A eomm'mnnsmr COMPOSED or BRUCE A.MIDDLEMISS AND JOHN C. BRACKETT.

SHOVELING AND LOADING MACHINE.

Specification of Letters Patent. Patented M 15 1921 Application filedMay 15, 1917, Serial No. 168,689. Renewed January 13, 1921. Serial No.437,128.

To all whom it may concern:

Be it known that 1, JOHN C. BRACKETT, citizen of the United States,residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented certain new and useful Improvements inshoveling and Loading Machines; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

My invention relates to loading and shoveling machines of a type adaptedto handle quickly detached masses of material individuall nage. n thisclass of machine it is necessary to construct apparatus which can read-'ily be moved, and which is lightand powerful in its action.

p The particular type of machine illustrated employs tail rodconstruction for the motions auxiliary to the digging strokfe,

v and is generally of the single cylinder overhead swinging typesubject, however, to the obvious alternatives of design which I- will Ienumerate in the following. This type of shovel, while it is designedfor manual operation, can obviously be made automatic in its action.

My invention has for its object the construction of a shoveling machineemploying a powerful digging cylinder which may be combined with anauxiliary cylinder for breaking the shovel upward vertically from itspile of material subsequently to the diggin'g stroke. This auxiliarylifting motlon may also be accomplished by a simple linkage.

A further object is the designing of a loading machine primarily adaptedfor overhead delivery into a car directly in line with the principalaxis of the machine, but which is readily adaptable by giving a lateralinclination to the main bearings of the machine to load cars on aparallel track alongside of the machine.

A further object of my invention is to provide a reciprocating cylindertype of machine adaptable for doing work exclusively by means of asingle cylinder, or

which may for heavy work be operated by a heavy cylinder whichreciprocates the shoveling element, and finishes the overheadtransferring movement in combination small but of large aggregatetonwith an auxiliary cylinder which assists the early stages of thelifting stroke.

It is obvious that automatic operation of" ing, more or lessdiagrammatically, a suitable embodiment of the invention,

F1gure l is a side view of the loadlng machme 1n the lowered or diggingposition.

Fig. is a diagram of the apparatus 1n the raised or dischargingposition.

Fig. 3 indicates the necessary air or steam piping for actuation of thereciprocating elements. g i

Referring to the drawings, 1 is a bucket or shovel mounted on a pistonrod 2 which is rigidly connected to a piston 3 operating in an air'orsteam cylinder 4; at the rear of the cylinder a tail rod 5' equippedwith a buffer plate 6 is arranged to coact with a curved parabolic"guide 7 through the medium of an anti-friction roller 8. The cylinder 4is pivotally secured to the steel frame of the machine by pin 9supported on a steel structure 10 which forms part of the truck frame11. The truck frame is mounted upon wheels 12 arranged fortransportation on. the standard narrow gages prevalent in undergroundmining.

With the machine in the lowered position,

raise cylinder 4 and shovel 1, verticallythrough a small travelsufficient to break the1 shovel loose from the ,pile of the materia vAir is then admitted to the front of the shovel, and at the same timethe air presrod 5.; Guide 7 is constructed so as in all positions of thecylinder 4 to offer a resisting surface normal to,the center line oftail rod 5 thus it will be seen that continued rearward motion of piston3 results in a steady backward andtoverhead motion of the shovel 1 untilthe vertical position, shown in Fig. 2, is reached.

At this point pad 16 on cylinder 4 comes into contact with spring bumper17 mounted on frame 10 effecting a cushioned'stop of the "travel of thecylinder whereby its contents 1s discharged into chute 18 thence intocar 19. As the center of gravity of cylinder 4 and its adjoiningmechanism is well outside of pin 9 release of the air pressure betweenpiston 3 and the cylinder head adjacent to the shovel now permitscylinder 4 to drop back into the horizontal position, the rate of itsdrop being regulated by the suddenness with which the air pressure isreleased. When the piston and shovel have traveled about half of thestroke forward the cylinder 4 will again have resumed its normalhorizontal position, air in the meantime having been released fromcylinder 13 permitting piston 15 to drop back to its lower position.Admission ofair to the lefthand side of piston 3 and release of airpressure on the other side of the said piston now causes shovel 1 torepeat its diggin stroke.

At 20 I have in icated a link which for 1i ht work may be used toreplace the action 0 cylinder 13 as a means for assisting the initiallift of the shovel away from the material. Link'2O is pivotally mountedat 21 an appreciable distance below the center line of piston 2.Retraction of piston 2 and shovel '1 beyond a point where the shovelen-.

gages the outer extremity of link 20 generates a turnin moment aroundpin 21 serving to assist t e initial lift of the shovel.

Referring to Fig. -3-- in which are illustrated the necessary air orsteam connections for actuation of the cylinders 22 is a source ofsupply for fluid pressure 23 and 24 the housing and plug respectively ofa standard four-way cock which controls the inlet andexhaust-connections to the c linder 4. With the plug in the position sown air 'i'sadmitted from pipe 22 through port 25 and pipe 27 to theforward end of the cylinder, the rear end of the cylinder in themeantime being connected through pipe 28 and port 26 to the atmosphere.

Rotating plug 24 ninety degrees clockwise connects the rear end ofcylinder 4 to and port 25. 29 and 30 are the plug and casingrespectively of a three-way cock op-' erating auxiliary cylinder 13. LWith the plug in position shown fluid pressure is admitted to the bottomof cylinder 13 through pipe 22, port 31 and, pipe 32. With plug 29rotated ninety degrees anti-clockwise cylinder 13 is connected free totheat'mosphere through pipe 22and port 31.

I claim asmy invention:

1. .A' shoveling machine including a pivotally mounted cylinder, a"piston therefor, a shovel adapted to be reciprocated by the piston, arigid parabolic guide disposed opposite one end of the cylinder, and areciprocable element associated with the said cylinder and the saidguide and adapted to be actuated by the piston as the latter moves in.

-a shovel adapted to be reciprocated" by the piston, a rigid parabolicguide disposed opposite one end of the cylinder, and a reciprocableelement associated with the said cylinder and the said guide and adaptedto be actuated by the piston as the latter moves to retract the shovelfor effecting a swinging movement of the cylinder to effect delivery ofload from the shovel.

3. A shoveling machine comprising a carriage, a motive element pivotallymounted thereon, a reciprocable element adapted to be actuated bysaidmotive element, a shovel earned by sald reciprocable element and adaptedto be projected into the pile and retracted therefrom when loaded, afixed uide element, and means associated with sai reciprocable elementfor converting retractive movement of said shovel intoswinging movementthereof to load delivery position.

4. A shoveling machine including a shoveling element,-arranged forreciprocation b a fluid-actuated piston, a piston rod, a cy indercasing, an auxiliary piston rod, and

means whereby the said piston coacts with the said auxiliary piston rodto modify the reciprocatlve action of the shovel.

5. A shoveling machine including a shov eling element, arranged forfeciprocation b a fluid-actuated piston, a piston rod, a cy inder casinan auxiliary rearwardly extendmg ro and means whereby the said pistoncoacts with the said auxiliary piston red tci modify the reciprocativeaction of the s We 6. A shoveling machine including a shov-i 'elingelement, arranged forreciprocation by a fluid-actuated piston, a pistonrod, 9.

cylinder casing, an auxiliary piston rod, a

stationary guide therefor, and means whereby the said piston coacts withthe said auxiliary piston rod to modify the reciprocative action of theshovel.

7. A shoveling machine including a piv- 1 otally mounted cylinder, apiston therefor, a

shovel adapted to be reciprocated by thepiston, means associated withthe cylinder and piston for resisting movement of the piston in onedirection whereby to cause the cylinder to swing pivotally during .said

movement of the piston, said means adapted to efi'ect movement of: thepiston in the opposite direction as the cylinder returns to 15 JOHN 0.BRACKETT.

Witnesses i M. M. BoYLE, C. L. BALDWIN.

